What's the difference???

A transponder can be CONUS (continental united states) or Spotbeam. A Satellite usually has 26 CONUS transponder's, by using Spotbeam's they can have 60 or more transponder's by re-using TP frequency's in that band.

EchoStar X
http://www.lyngsat.com/echo10.html
 
Reason I ask is I was messing around with the point dish feature. Had it on the 110 SAT and was toggling the transponders and some of them changed to spotbeams after locking.
 
That's Dish terminology :( - should be type of transponder: 'conus' and 'spot beam'; a transponder still doing same functions, but a shape of antenna is different.
 
The spotbeams are only visible in certain "spots" on the earth, just like pointing a flashlight on the wall, there is a circular spot of light.

So, local channels are only beamed to the areas that can normally receiver those channels.
 

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